Combined sensor/emergency light unit for a lighting system

1. An emergency light system comprising: a combined sensor/emergency light unit ( 18 ), the combined sensor/emergency light unit comprising: at least one emergency light means ( 16 ), one emergency light ( 15 ) unit, and one rechargeable storage device ( 17 ) for electrical energy, wherein the emergency light unit ( 15 ) is adapted to supply electrical energy to a low-voltage power supply connection, from DC bus voltage, for charging the storage device ( 17 ) with electrical energy; a bus ( 2 ), which supplies DC voltage in standby state; and a bus signal generator, which is connected to the bus ( 2 ) and which further loops the bus voltage to the integrated or separately provided emergency light unit ( 15 ).

2. The emergency light system according to claim 1 , wherein the emergency light unit ( 15 ) is adapted to monitor the voltage at the low-voltage supply connection and to evaluate a long-term voltage failure as an emergency light situation and accordingly to activate the emergency lighting means ( 16 ).

3. An emergency light unit ( 15 ) for a lighting system, which is connected to a bus ( 2 ) of the lighting system, and to a rechargeable storage device ( 17 ) for electrical energy and to an emergency lighting means ( 16 ), wherein current from the bus ( 2 ) can be supplied for recharging to the storage device ( 17 ) and wherein the emergency light unit ( 15 ) is integrated or connected with a bus-capable sensor module control device ( 20 ).

4. The emergency light unit ( 15 ) according to claim 3 , wherein the emergency light unit is arranged together with: the control device ( 20 ), the storage device ( 17 ) for electrical energy, and the emergency light means ( 16 ) in a joint housing ( 21 ).

5. The emergency light unit ( 15 ) according to claim 3 , further comprising sensor optics ( 19 ) and wherein a cavity is provided in the housing ( 21 ) which is opened at a top portion thereof for attachment to a ceiling for illumination of a specific area, so that the sensor optics ( 19 ) and an emergency lamp ( 16 ) protrude from a bottom side thereof.

6. The emergency light unit ( 15 ) according to claim 5 , wherein the housing ( 21 ) is a rotationally symmetrical body, and the sensor optics ( 19 ) are arranged in a central position and surround by a plurality of LEDs ( 16 ) in an annular shape forming the emergency light.

7. The emergency light unit ( 15 ) according to claim 3 , wherein the storage device ( 17 ) for electrical energy is a rechargeable battery.